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There will also be thousands of Lightning Deals during the sale - products available at a discount, in limited quantities, for a short period of time.

Amazon Prime members, including customers enjoying a free 30-day trial of the service, have an exclusive 30-minute early access period to all Lightning Deals.

Selected deals will also be available through Prime Now, Amazon’s app that offers ultra-fast delivery to Prime customers.

So what's on offer? We took a look at the deals already up for grabs as the sales kicked off.

Up to £350 off TVs

Televisions seem to be a standard part of deals and sales and Black Friday is no exception.

Sony's popular and well-reviewed Bravia 65-inch Android 4K HDR Ultra HD Smart TV is down from £1,699 to £1,299. The 49-inch equivalent is down from £899 to £629, a drop of 30 per cent.

Among other discounts, the LG 49UF675V Ultra HD 4K 49-inch TV is reduced by 43 per cent from £899.99 to £515. A 43-inch model is down by 33 per cent to £399, and a 22-inch from £119 to £88.99. If you really want a whopper, LG's 70-inch model is in the sales and down from £3,499.99 to £2,475.

Singing Machine SML-385 Karaoke Machine Party Pack

Singing Machine karaoke machine in the Amazon Black Friday deals

This is reduced from £74.99 to £49.99, a saving of £25 (33 per cent).

Perfect for festive fun with the family, this is a karaoke machine with disco lights, two microphone plug-in points, top-loading for easy swapping of CDs, and comes with two CDs of chart hits and one of kids' music. Other Singing Machine karaoke models are in the sale too.

Rocket Dog women's boots

There's up to 70 per cent off Rocket Dog's range of women's boots, so if you're planning some winter walks, these would be ideal. There's a range of styles from zip-up fleece-lined boots and block-heel biker boots to ankle boots and Chelsea boots.

Women's watches

There are big discounts on women's watches. Anne Klein watches are down from £65 to £45.50 (a saving of 30 per cent) including the Chelsea Quartz Watch with Grey Dial, while the Oasis Women's Quartz Watch with White Dial and Gold Alloy Bracelet down from £60 to £27.99, a saving of £22 or 44 per cent.

Men's trainers

Vans Atwood trainers are down in price by 38 per cent, the Men's Low-Top Trainers pictured here are reduced from £45 to £27.99. Unisex trainers in various colours including crimson, aqua, purple, green and blue are reduced by 15 per cent from £34.99 to £29.69.

Bluetooth headphones and speakers

Wireless bluetooth headphones are perfect to listening to your music - or movies - without cables trailing all over the place. Bluedio's T2 black or white headset is reduced from £24.99 to £14.99, while its super-stylish Vinyl Plus Light Extravagance headphones are discounted by 47 per cent from £199.99 to £106.99.